Libby 32 SSE Weather Records (USC00245020)

Record envelope, standing records and threshold days for Libby 32 SSE (USC00245020), Montana, United States, with 112 years of record.

Key Facts for Libby 32 SSE

Libby 32 SSE (USC00245020) is a weather station in Montana, United States at 47.96 latitude and -115.21 longitude, 1,049 m (3,440 ft) above sea level.
The station reports from 1910 to 2021, 112 years of record.
1,464 records set at Libby 32 SSE still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Libby 32 SSE set a daily record snowfall of 5.1 cm (2.0 in) on 10 April 2021.

About the Station

Location: Montana, United States, 47.96 latitude, -115.21 longitude.
Elevation: 1,049 m (3,440 ft).
Period of record: 1910 to 2021, 112 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Libby 32 SSE. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Libby 32 SSE, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	14.4 C (57.9 F)	-42.2 C (-44.0 F)	n/a	n/a
Feb	15.0 C (59.0 F)	-40.0 C (-40.0 F)	n/a	n/a
Mar	23.3 C (73.9 F)	-33.3 C (-27.9 F)	n/a	n/a
Apr	30.6 C (87.1 F)	-18.9 C (-2.0 F)	n/a	n/a
May	31.7 C (89.1 F)	-13.3 C (8.1 F)	n/a	n/a
Jun	36.1 C (97.0 F)	-6.1 C (21.0 F)	n/a	n/a
Jul	36.7 C (98.1 F)	-3.3 C (26.1 F)	n/a	n/a
Aug	38.9 C (102.0 F)	-5.6 C (21.9 F)	n/a	n/a
Sep	37.8 C (100.0 F)	-13.3 C (8.1 F)	n/a	n/a
Oct	27.2 C (81.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Nov	18.3 C (64.9 F)	-32.2 C (-26.0 F)	n/a	n/a
Dec	11.7 C (53.1 F)	-41.7 C (-43.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Libby 32 SSE still stand. 1950 holds the most, with 40.

Standing records at Libby 32 SSE by the year they were set
Year set	Standing records
1910	22
1911	10
1912	3
1949	22
1950	40
1951	29
1952	23
1953	23
1954	21
1955	33
1956	12
1957	18
1958	10
1959	6
1960	25
1961	29
1962	18
1963	23
1964	19
1965	22
1966	15
1967	28
1968	13
1969	15
1970	6
1971	14
1972	29
1973	28
1974	14
1975	16
1976	8
1977	19
1978	9
1979	18
1980	23
1981	22
1982	18
1983	30
1984	26
1985	35
1986	29
1987	26
1988	21
1989	23
1990	17
1991	17
1992	23
1993	35
1994	15
1995	22
1996	18
1997	22
1998	19
1999	24
2000	20
2001	25
2002	31
2003	23
2004	20
2005	26
2006	14
2007	20
2008	25
2009	18
2010	11
2011	15
2012	9
2013	14
2014	16
2015	17
2016	9
2017	1
2018	11
2019	13
2020	15
2021	6

All-Time Record Progression

3 new records

3 all-time records were set at Libby 32 SSE between 2 February 1989 and 20 March 2002. Each dot is a new record.

When Libby 32 SSE set new all-time records
Date	Kind	Detail
1989-02-02	Record low maximum temperature	Record low maximum temperature -25.0 C (-13.0 F)
1996-11-19	Record daily snowfall	Record daily snowfall 46.0 cm (18.1 in)
2002-03-20	Record daily snowfall	Record daily snowfall 48.0 cm (18.9 in)

Wettest Day of Each Month

Jun: 96.5 mm (3.8 in)

The wettest day on record for each calendar month at Libby 32 SSE. The most was 96.5 mm (3.8 in) on 30 June 1911.

Record daily precipitation for each month at Libby 32 SSE
Month	Record daily precipitation (mm)	Date
Jan	50.8 mm (2.0 in)	9 January 1953
Feb	52.6 mm (2.1 in)	5 February 2018
Mar	53.3 mm (2.1 in)	3 March 2017
Apr	35.8 mm (1.4 in)	6 April 1972
May	54.4 mm (2.1 in)	27 May 1998
Jun	96.5 mm (3.8 in)	30 June 1911
Jul	40.6 mm (1.6 in)	17 July 1954
Aug	40.6 mm (1.6 in)	27 August 1966
Sep	33.3 mm (1.3 in)	18 September 1957
Oct	40.4 mm (1.6 in)	27 October 1994
Nov	59.2 mm (2.3 in)	10 November 2017
Dec	49.0 mm (1.9 in)	8 December 2015

Period of Record Coverage

1910 to 2021

76 years of record at Libby 32 SSE, 1910 to 2021. 11 years have data for under 90 percent of days and are left out of rankings: 1910, 1911, 1912, 1949, 1958, 1959, 2014, 2017 and others.

Days with data per year at Libby 32 SSE
Year	Days with data	Share of year	Complete
1910	255	70%	No
1911	172	47%	No
1912	29	8%	No
1949	214	59%	No
1950	362	99%	Yes
1951	365	100%	Yes
1952	364	99%	Yes
1953	353	97%	Yes
1954	362	99%	Yes
1955	364	100%	Yes
1956	366	100%	Yes
1957	363	99%	Yes
1958	212	58%	No
1959	121	33%	No
1960	366	100%	Yes
1961	365	100%	Yes
1962	364	100%	Yes
1963	363	99%	Yes
1964	364	99%	Yes
1965	365	100%	Yes
1966	364	100%	Yes
1967	364	100%	Yes
1968	366	100%	Yes
1969	363	99%	Yes
1970	363	99%	Yes
1971	365	100%	Yes
1972	364	99%	Yes
1973	363	99%	Yes
1974	363	99%	Yes
1975	361	99%	Yes
1976	364	99%	Yes
1977	362	99%	Yes
1978	361	99%	Yes
1979	365	100%	Yes
1980	365	100%	Yes
1981	364	100%	Yes
1982	361	99%	Yes
1983	365	100%	Yes
1984	363	99%	Yes
1985	365	100%	Yes
1986	335	92%	Yes
1987	364	100%	Yes
1988	362	99%	Yes
1989	365	100%	Yes
1990	364	100%	Yes
1991	334	92%	Yes
1992	365	100%	Yes
1993	363	99%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	331	90%	Yes
1997	363	99%	Yes
1998	360	99%	Yes
1999	361	99%	Yes
2000	365	100%	Yes
2001	365	100%	Yes
2002	358	98%	Yes
2003	363	99%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	348	95%	Yes
2008	365	100%	Yes
2009	365	100%	Yes
2010	357	98%	Yes
2011	364	100%	Yes
2012	366	100%	Yes
2013	365	100%	Yes
2014	314	86%	No
2015	335	92%	Yes
2016	366	100%	Yes
2017	149	41%	No
2018	206	56%	No
2019	259	71%	No
2020	366	100%	Yes
2021	105	29%	No

Latest Records

Latest records at Libby 32 SSE
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
10 April 2021	Libby 32 SSE, US	daily snowfall	5.1 cm (2.0 in)	3.1 cm (1.2 in)	36 years	29 of 100 (Routine)
30 March 2021	Libby 32 SSE, US	daily low max (Tie)	1.1 C (34.0 F)	tie	12 years	3 of 100 (Routine)
27 March 2021	Libby 32 SSE, US	daily high min (Tie)	1.1 C (34.0 F)	tie	58 years	6 of 100 (Routine)
18 March 2021	Libby 32 SSE, US	daily high max	15.6 C (60.1 F)	1.7 C (3.1 F)	110 years	43 of 100 (Notable)
4 March 2021	Libby 32 SSE, US	daily high max	15.0 C (59.0 F)	2.8 C (5.0 F)	4 years	17 of 100 (Routine)
23 February 2021	Libby 32 SSE, US	daily rain	18.3 mm (0.7 in)	3.8 mm (0.15 in)	64 years	20 of 100 (Routine)
21 February 2021	Libby 32 SSE, US	daily high min (Tie)	0.0 C (32.0 F)	tie	60 years	7 of 100 (Routine)
12 February 2021	Libby 32 SSE, US	daily low max	-11.1 C (12.0 F)	2.8 C (5.0 F)	26 years	23 of 100 (Routine)
12 February 2021	Libby 32 SSE, US	daily low min	-28.3 C (-18.9 F)	7.2 C (13.0 F)	3 years	19 of 100 (Routine)
11 February 2021	Libby 32 SSE, US	daily low max	-15.0 C (5.0 F)	10.0 C (18.0 F)	26 years	38 of 100 (Notable)
11 February 2021	Libby 32 SSE, US	daily low min	-29.4 C (-20.9 F)	2.2 C (4.0 F)	27 years	21 of 100 (Routine)
2 January 2021	Libby 32 SSE, US	daily high min (Tie)	0.0 C (32.0 F)	tie	58 years	6 of 100 (Routine)
8 December 2020	Libby 32 SSE, US	daily high max	8.9 C (48.0 F)	0.6 C (1.1 F)	41 years	23 of 100 (Routine)
14 November 2020	Libby 32 SSE, US	daily snow depth	25.4 cm (10.0 in)	5.1 cm (2.0 in)	61 years	32 of 100 (Routine)
11 November 2020	Libby 32 SSE, US	daily snow depth (Tie)	20.3 cm (8.0 in)	tie	34 years	5 of 100 (Routine)
8 November 2020	Libby 32 SSE, US	daily low max	-5.6 C (21.9 F)	0.6 C (1.1 F)	34 years	21 of 100 (Routine)
25 October 2020	Libby 32 SSE, US	daily low min	-22.8 C (-9.0 F)	6.1 C (11.0 F)	18 years	28 of 100 (Routine)
25 October 2020	Libby 32 SSE, US	monthly low max (Tie)	-5.6 C (21.9 F)	tie	17 years	6 of 100 (Routine)
24 October 2020	Libby 32 SSE, US	daily snow depth	25.4 cm (10.0 in)	7.6 cm (3.0 in)	63 years	38 of 100 (Notable)
24 October 2020	Libby 32 SSE, US	daily low min	-24.4 C (-11.9 F)	7.2 C (13.0 F)	18 years	30 of 100 (Routine)

Climate Trend

60 complete years, 1950 to 2020

One stripe for each of 60 complete years at Libby 32 SSE, 1950 to 2020. Blue stripes are years cooler than the station's own mean of 4.8 C (40.6 F); red stripes are warmer. The coolest year was 1985, at 2.4 C (36.2 F), and the warmest was 1953, at 6.3 C (43.3 F). The strongest colour marks a difference of 2.5 C (4.5 F).

Annual mean temperature at Libby 32 SSE as warming stripes, 1950 to 2020
Year	Annual mean temperature	Difference from the station mean
1950	3.9 C	-0.92 C
1951	3.9 C	-0.90 C
1952	5.3 C	+0.54 C
1953	6.3 C	+1.47 C
1954	4.6 C	-0.18 C
1955	3.5 C	-1.28 C
1956	4.8 C	+0.04 C
1957	4.7 C	-0.04 C
1960	4.6 C	-0.17 C
1961	5.6 C	+0.79 C
1962	5.1 C	+0.33 C
1963	5.5 C	+0.73 C
1964	4.4 C	-0.40 C
1965	5.2 C	+0.42 C
1966	5.7 C	+0.90 C
1967	6.0 C	+1.26 C
1968	5.0 C	+0.18 C
1969	5.0 C	+0.18 C
1970	5.2 C	+0.43 C
1971	5.1 C	+0.34 C
1972	4.9 C	+0.15 C
1973	5.8 C	+0.97 C
1974	5.9 C	+1.14 C
1975	4.7 C	-0.04 C
1976	5.7 C	+0.89 C
1977	5.2 C	+0.39 C
1978	4.8 C	-0.01 C
1979	5.2 C	+0.39 C
1980	5.1 C	+0.35 C
1981	5.1 C	+0.28 C
1982	3.3 C	-1.47 C
1983	4.3 C	-0.53 C
1984	4.1 C	-0.70 C
1985	2.4 C	-2.42 C
1987	4.5 C	-0.25 C
1988	4.9 C	+0.07 C
1989	4.0 C	-0.80 C
1990	4.6 C	-0.23 C
1992	5.0 C	+0.20 C
1993	3.1 C	-1.69 C
1994	4.7 C	-0.10 C
1995	4.8 C	-0.03 C
1997	4.5 C	-0.33 C
1998	5.9 C	+1.14 C
1999	5.1 C	+0.32 C
2000	3.9 C	-0.85 C
2001	4.6 C	-0.16 C
2002	4.4 C	-0.42 C
2003	5.0 C	+0.24 C
2004	5.4 C	+0.57 C
2005	4.8 C	-0.02 C
2006	4.9 C	+0.07 C
2008	4.0 C	-0.78 C
2009	4.6 C	-0.17 C
2010	4.6 C	-0.22 C
2011	4.2 C	-0.58 C
2012	5.1 C	+0.27 C
2013	4.5 C	-0.33 C
2016	5.5 C	+0.72 C
2020	5.0 C	+0.21 C

The fitted trend in annual mean temperature here over 1950 to 2020 is -0.05 C (-0.15 to 0.05) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.1) per decade. The slope is a straight line fitted to 60 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Libby 32 SSE
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.05 C (-0.15 to 0.05) per decade	-0.1 F (-0.3 to 0.1) per decade	1950 to 2020	60	Not clearly different from zero
Mean daily maximum	0.09 C (-0.01 to 0.20) per decade	0.17 F (-0.02 to 0.36) per decade	1950 to 2020	60	Not clearly different from zero
Mean daily minimum	-0.2 C (-0.3 to -0.1) per decade	-0.4 F (-0.6 to -0.1) per decade	1950 to 2020	60	Fall

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1910 to 2021

Yearly extremes at Libby 32 SSE: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.9 C (102.0 F)	1961	33.9 C (93.0 F)	76
Coldest night (TNn)	-42.2 C (-44.0 F)	1950	-30.6 C (-23.1 F)	76
Wettest day (Rx1day)	96.5 mm (3.8 in)	1911	27.0 mm (1.1 in)	76
Wettest five days (Rx5day)	143.3 mm (5.6 in)	1974	56.2 mm (2.2 in)	76
Longest dry spell (CDD)	69 days	1987	26 days	76

Hottest day (TXx)

The hottest day of the year at Libby 32 SSE, 1910 to 2021. The record is 38.9 C (102.0 F) in 1961, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at Libby 32 SSE by year
Year	Hottest day (TXx)
1910	36.7 C (98.1 F)
1911	30.0 C (86.0 F)
1912	8.3 C (46.9 F)
1948	n/a
1949	34.4 C (93.9 F)
1950	37.8 C (100.0 F)
1951	34.4 C (93.9 F)
1952	35.6 C (96.1 F)
1953	36.7 C (98.1 F)
1954	32.2 C (90.0 F)
1955	33.9 C (93.0 F)
1956	33.9 C (93.0 F)
1957	31.1 C (88.0 F)
1958	31.7 C (89.1 F)
1959	29.4 C (84.9 F)
1960	36.7 C (98.1 F)
1961	38.9 C (102.0 F)
1962	36.1 C (97.0 F)
1963	36.1 C (97.0 F)
1964	33.9 C (93.0 F)
1965	34.4 C (93.9 F)
1966	33.3 C (91.9 F)
1967	36.1 C (97.0 F)
1968	33.9 C (93.0 F)
1969	36.1 C (97.0 F)
1970	33.9 C (93.0 F)
1971	34.4 C (93.9 F)
1972	33.9 C (93.0 F)
1973	33.9 C (93.0 F)
1974	33.3 C (91.9 F)
1975	35.0 C (95.0 F)
1976	32.2 C (90.0 F)
1977	34.4 C (93.9 F)
1978	33.9 C (93.0 F)
1979	35.0 C (95.0 F)
1980	33.3 C (91.9 F)
1981	35.6 C (96.1 F)
1982	31.7 C (89.1 F)
1983	33.9 C (93.0 F)
1984	35.6 C (96.1 F)
1985	35.6 C (96.1 F)
1986	32.2 C (90.0 F)
1987	32.2 C (90.0 F)
1988	33.9 C (93.0 F)
1989	32.2 C (90.0 F)
1990	33.9 C (93.0 F)
1991	32.8 C (91.0 F)
1992	34.4 C (93.9 F)
1993	30.0 C (86.0 F)
1994	35.6 C (96.1 F)
1995	29.4 C (84.9 F)
1996	33.3 C (91.9 F)
1997	32.2 C (90.0 F)
1998	35.0 C (95.0 F)
1999	32.8 C (91.0 F)
2000	35.0 C (95.0 F)
2001	34.4 C (93.9 F)
2002	36.1 C (97.0 F)
2003	35.6 C (96.1 F)
2004	32.8 C (91.0 F)
2005	32.8 C (91.0 F)
2006	34.4 C (93.9 F)
2007	35.6 C (96.1 F)
2008	33.9 C (93.0 F)
2009	32.8 C (91.0 F)
2010	31.7 C (89.1 F)
2011	30.6 C (87.1 F)
2012	30.6 C (87.1 F)
2013	32.2 C (90.0 F)
2014	32.8 C (91.0 F)
2015	36.1 C (97.0 F)
2016	31.7 C (89.1 F)
2017	30.6 C (87.1 F)
2018	31.7 C (89.1 F)
2019	32.8 C (91.0 F)
2020	34.4 C (93.9 F)
2021	17.2 C (63.0 F)

Coldest night (TNn)

The coldest night of the year at Libby 32 SSE, 1910 to 2021. The record is -42.2 C (-44.0 F) in 1950, marked on the chart; the median year is -30.6 C (-23.1 F).

Coldest night (TNn) at Libby 32 SSE by year
Year	Coldest night (TNn)
1910	-15.0 C (5.0 F)
1911	-28.9 C (-20.0 F)
1912	-27.8 C (-18.0 F)
1948	n/a
1949	-26.7 C (-16.1 F)
1950	-42.2 C (-44.0 F)
1951	-36.7 C (-34.1 F)
1952	-33.3 C (-27.9 F)
1953	-21.1 C (-6.0 F)
1954	-30.0 C (-22.0 F)
1955	-30.0 C (-22.0 F)
1956	-30.6 C (-23.1 F)
1957	-33.9 C (-29.0 F)
1958	-19.4 C (-2.9 F)
1959	-32.2 C (-26.0 F)
1960	-30.6 C (-23.1 F)
1961	-30.6 C (-23.1 F)
1962	-31.7 C (-25.1 F)
1963	-33.3 C (-27.9 F)
1964	-35.6 C (-32.1 F)
1965	-25.6 C (-14.1 F)
1966	-22.2 C (-8.0 F)
1967	-21.7 C (-7.1 F)
1968	-38.3 C (-36.9 F)
1969	-25.6 C (-14.1 F)
1970	-25.0 C (-13.0 F)
1971	-23.9 C (-11.0 F)
1972	-30.6 C (-23.1 F)
1973	-29.4 C (-20.9 F)
1974	-28.3 C (-18.9 F)
1975	-25.6 C (-14.1 F)
1976	-23.9 C (-11.0 F)
1977	-25.0 C (-13.0 F)
1978	-33.9 C (-29.0 F)
1979	-34.4 C (-29.9 F)
1980	-30.6 C (-23.1 F)
1981	-29.4 C (-20.9 F)
1982	-38.9 C (-38.0 F)
1983	-38.9 C (-38.0 F)
1984	-31.1 C (-24.0 F)
1985	-37.8 C (-36.0 F)
1986	-27.2 C (-17.0 F)
1987	-27.2 C (-17.0 F)
1988	-30.0 C (-22.0 F)
1989	-36.1 C (-33.0 F)
1990	-41.7 C (-43.1 F)
1991	-26.7 C (-16.1 F)
1992	-25.6 C (-14.1 F)
1993	-37.2 C (-35.0 F)
1994	-38.9 C (-38.0 F)
1995	-27.2 C (-17.0 F)
1996	-39.4 C (-38.9 F)
1997	-33.9 C (-29.0 F)
1998	-35.6 C (-32.1 F)
1999	-20.0 C (-4.0 F)
2000	-28.3 C (-18.9 F)
2001	-31.7 C (-25.1 F)
2002	-30.0 C (-22.0 F)
2003	-27.8 C (-18.0 F)
2004	-41.1 C (-42.0 F)
2005	-34.4 C (-29.9 F)
2006	-34.4 C (-29.9 F)
2007	-31.7 C (-25.1 F)
2008	-36.1 C (-33.0 F)
2009	-33.3 C (-27.9 F)
2010	-32.2 C (-26.0 F)
2011	-32.2 C (-26.0 F)
2012	-22.8 C (-9.0 F)
2013	-30.6 C (-23.1 F)
2014	-40.0 C (-40.0 F)
2015	-22.8 C (-9.0 F)
2016	-31.7 C (-25.1 F)
2017	-28.3 C (-18.9 F)
2018	-29.4 C (-20.9 F)
2019	-19.4 C (-2.9 F)
2020	-24.4 C (-11.9 F)
2021	-29.4 C (-20.9 F)

Wettest day (Rx1day)

The wettest day of the year at Libby 32 SSE, 1910 to 2021. The record is 96.5 mm (3.8 in) in 1911, marked on the chart; the median year is 27.0 mm (1.1 in).

Wettest day (Rx1day) at Libby 32 SSE by year
Year	Wettest day (Rx1day)
1910	21.1 mm (0.8 in)
1911	96.5 mm (3.8 in)
1912	11.4 mm (0.4 in)
1948	n/a
1949	25.1 mm (1.0 in)
1950	26.2 mm (1.0 in)
1951	23.9 mm (0.9 in)
1952	25.4 mm (1.0 in)
1953	50.8 mm (2.0 in)
1954	40.6 mm (1.6 in)
1955	49.5 mm (1.9 in)
1956	20.1 mm (0.8 in)
1957	33.3 mm (1.3 in)
1958	19.8 mm (0.8 in)
1959	21.1 mm (0.8 in)
1960	28.2 mm (1.1 in)
1961	23.1 mm (0.9 in)
1962	18.3 mm (0.7 in)
1963	32.0 mm (1.3 in)
1964	57.7 mm (2.3 in)
1965	22.9 mm (0.9 in)
1966	40.6 mm (1.6 in)
1967	26.7 mm (1.1 in)
1968	27.2 mm (1.1 in)
1969	30.5 mm (1.2 in)
1970	30.2 mm (1.2 in)
1971	25.4 mm (1.0 in)
1972	35.8 mm (1.4 in)
1973	24.6 mm (1.0 in)
1974	46.0 mm (1.8 in)
1975	26.7 mm (1.1 in)
1976	24.4 mm (1.0 in)
1977	26.2 mm (1.0 in)
1978	27.7 mm (1.1 in)
1979	27.9 mm (1.1 in)
1980	30.5 mm (1.2 in)
1981	21.8 mm (0.9 in)
1982	29.5 mm (1.2 in)
1983	25.9 mm (1.0 in)
1984	34.3 mm (1.4 in)
1985	23.9 mm (0.9 in)
1986	27.9 mm (1.1 in)
1987	37.8 mm (1.5 in)
1988	20.1 mm (0.8 in)
1989	27.7 mm (1.1 in)
1990	43.7 mm (1.7 in)
1991	20.3 mm (0.8 in)
1992	38.9 mm (1.5 in)
1993	27.9 mm (1.1 in)
1994	40.4 mm (1.6 in)
1995	24.4 mm (1.0 in)
1996	45.0 mm (1.8 in)
1997	30.2 mm (1.2 in)
1998	54.4 mm (2.1 in)
1999	24.9 mm (1.0 in)
2000	20.6 mm (0.8 in)
2001	17.3 mm (0.7 in)
2002	25.4 mm (1.0 in)
2003	23.1 mm (0.9 in)
2004	25.4 mm (1.0 in)
2005	27.4 mm (1.1 in)
2006	36.3 mm (1.4 in)
2007	20.8 mm (0.8 in)
2008	21.6 mm (0.9 in)
2009	25.9 mm (1.0 in)
2010	33.0 mm (1.3 in)
2011	15.7 mm (0.6 in)
2012	24.6 mm (1.0 in)
2013	20.6 mm (0.8 in)
2014	54.6 mm (2.1 in)
2015	49.0 mm (1.9 in)
2016	44.5 mm (1.8 in)
2017	59.2 mm (2.3 in)
2018	52.6 mm (2.1 in)
2019	30.5 mm (1.2 in)
2020	25.4 mm (1.0 in)
2021	18.3 mm (0.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Libby 32 SSE, 1910 to 2021. The record is 143.3 mm (5.6 in) in 1974, marked on the chart; the median year is 56.2 mm (2.2 in).

Wettest five days (Rx5day) at Libby 32 SSE by year
Year	Wettest five days (Rx5day)
1910	46.8 mm (1.8 in)
1911	96.5 mm (3.8 in)
1912	19.0 mm (0.7 in)
1948	n/a
1949	39.6 mm (1.6 in)
1950	84.4 mm (3.3 in)
1951	56.7 mm (2.2 in)
1952	43.5 mm (1.7 in)
1953	98.9 mm (3.9 in)
1954	75.9 mm (3.0 in)
1955	88.0 mm (3.5 in)
1956	42.5 mm (1.7 in)
1957	68.8 mm (2.7 in)
1958	35.3 mm (1.4 in)
1959	54.8 mm (2.2 in)
1960	44.2 mm (1.7 in)
1961	61.2 mm (2.4 in)
1962	43.3 mm (1.7 in)
1963	61.9 mm (2.4 in)
1964	104.1 mm (4.1 in)
1965	51.1 mm (2.0 in)
1966	56.4 mm (2.2 in)
1967	55.7 mm (2.2 in)
1968	55.9 mm (2.2 in)
1969	57.1 mm (2.2 in)
1970	57.1 mm (2.2 in)
1971	70.1 mm (2.8 in)
1972	79.5 mm (3.1 in)
1973	41.2 mm (1.6 in)
1974	143.3 mm (5.6 in)
1975	90.5 mm (3.6 in)
1976	44.7 mm (1.8 in)
1977	47.3 mm (1.9 in)
1978	50.6 mm (2.0 in)
1979	53.9 mm (2.1 in)
1980	72.6 mm (2.9 in)
1981	51.5 mm (2.0 in)
1982	60.7 mm (2.4 in)
1983	54.3 mm (2.1 in)
1984	57.7 mm (2.3 in)
1985	52.8 mm (2.1 in)
1986	48.1 mm (1.9 in)
1987	53.3 mm (2.1 in)
1988	43.8 mm (1.7 in)
1989	64.8 mm (2.6 in)
1990	79.3 mm (3.1 in)
1991	38.8 mm (1.5 in)
1992	60.8 mm (2.4 in)
1993	62.4 mm (2.5 in)
1994	74.1 mm (2.9 in)
1995	73.6 mm (2.9 in)
1996	96.5 mm (3.8 in)
1997	95.6 mm (3.8 in)
1998	85.7 mm (3.4 in)
1999	37.4 mm (1.5 in)
2000	32.7 mm (1.3 in)
2001	32.5 mm (1.3 in)
2002	56.4 mm (2.2 in)
2003	40.9 mm (1.6 in)
2004	55.6 mm (2.2 in)
2005	61.1 mm (2.4 in)
2006	86.1 mm (3.4 in)
2007	30.6 mm (1.2 in)
2008	44.0 mm (1.7 in)
2009	43.7 mm (1.7 in)
2010	68.6 mm (2.7 in)
2011	39.6 mm (1.6 in)
2012	47.7 mm (1.9 in)
2013	38.9 mm (1.5 in)
2014	68.6 mm (2.7 in)
2015	87.8 mm (3.5 in)
2016	52.6 mm (2.1 in)
2017	99.3 mm (3.9 in)
2018	59.2 mm (2.3 in)
2019	47.3 mm (1.9 in)
2020	61.5 mm (2.4 in)
2021	24.4 mm (1.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Libby 32 SSE, 1910 to 2021. The record is 69 days in 1987, marked on the chart; the median year is 26 days.

Longest dry spell (CDD) at Libby 32 SSE by year
Year	Longest dry spell (CDD)
1910	32 days
1911	17 days
1912	10 days
1948	n/a
1949	17 days
1950	20 days
1951	32 days
1952	30 days
1953	35 days
1954	25 days
1955	41 days
1956	25 days
1957	15 days
1958	14 days
1959	8 days
1960	40 days
1961	23 days
1962	20 days
1963	37 days
1964	14 days
1965	23 days
1966	31 days
1967	53 days
1968	24 days
1969	66 days
1970	32 days
1971	22 days
1972	17 days
1973	29 days
1974	31 days
1975	17 days
1976	15 days
1977	36 days
1978	32 days
1979	33 days
1980	21 days
1981	53 days
1982	16 days
1983	20 days
1984	36 days
1985	31 days
1986	37 days
1987	69 days
1988	20 days
1989	15 days
1990	35 days
1991	31 days
1992	16 days
1993	22 days
1994	29 days
1995	17 days
1996	36 days
1997	17 days
1998	21 days
1999	19 days
2000	48 days
2001	22 days
2002	27 days
2003	32 days
2004	17 days
2005	26 days
2006	28 days
2007	42 days
2008	26 days
2009	25 days
2010	33 days
2011	20 days
2012	26 days
2013	24 days
2014	24 days
2015	33 days
2016	24 days
2017	27 days
2018	35 days
2019	28 days
2020	32 days
2021	19 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

60 years with a frost

Across 60 years with a frost, the median last spring frost at Libby 32 SSE falls on 23 June and the median first autumn frost on 11 July, which leaves a median of 19 days between them.

In 1982 to 2020 the median growing season was 15 days. That is 42 days fewer than in 1950 to 1981.

Fitted over all years, the growing season changes by -6.7 days per decade at this station.

Frost dates and growing season at Libby 32 SSE
Measure	Median, all years	Earliest period (1950 to 1981)	Recent period (1982 to 2020)	Recent against earliest	Fitted trend
Last spring frost	23 June	18 June	24 June	6 days later	+1.2 days per decade
First autumn frost	11 July	11 August	5 July	37 days earlier	-5.4 days per decade
Growing days	19 days	57 days	15 days	42 days fewer	-6.7 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

65 years, 1950 to 2020

A day with at least 27.8 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 66.9 mm (2.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Libby 32 SSE: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	27.8 mm (1.1 in)
5 years	36.0 mm (1.4 in)
10 years	42.3 mm (1.7 in)
25 years	51.2 mm (2.0 in)
50 years	58.7 mm (2.3 in)
100 years	66.9 mm (2.6 in)	Longer than the 65 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 65 years of values from 1950 to 2020.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 57.7 mm (2.3 in) in 1964; 54.4 mm (2.1 in) in 1998; 50.8 mm (2.0 in) in 1953.

Station Changes

3 suspected

3 changes were suspected in the annual mean temperature of Libby 32 SSE, at 1969, 1981 and 1995. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1969 ran 0.3 C (0.6 F) higher than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1981 ran 1.0 C (1.8 F) lower than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1995 ran 0.4 C (0.7 F) higher than in the years before (likely change).

Suspected changes in the annual mean temperature at Libby 32 SSE, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1969	+0.3	+0.6	likely	5
1981	-1.0	-1.8	likely	5
1995	+0.4	+0.7	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

Data for Libby 32 SSE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Libby 32 SSE threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).